Application of a synthetic rock mass approach to the simulation of blasting-induced crack propagation and coalescence in deep fractured rock
文献类型：期刊论文
| 作者 | Li, Xing2,3; Pan, Cheng3; Li, Xiaofeng2; Shao, Chengmeng1,3; Li, Haibo2
|
| 刊名 | GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
 |
| 出版日期 | 2022-04-01 |
| 卷号 | 8期号:2页码:17 |
| 关键词 | Synthetic rock mass Double-borehole blasting High in situ stress Crack coalescence Discrete element model |
| ISSN号 | 2363-8419 |
| DOI | 10.1007/s40948-022-00376-4 |
| 英文摘要 | As the excavation depth of underground engineering increases, the influence of in situ stress on the blasting effect cannot be ignored. The large number of fractures in the natural rock mass, coupled with the in situ stress, significantly impacts the propagation of stress waves. In this research, a synthetic rock mass approach based on the UDEC grain-based model was employed to investigate crack propagation and coalescence during double-borehole blasting with a variety of fracture networks and in situ stress conditions. The effects of the buried depth, fracture geometric parameters (i.e., the length and intensity), blast parameters (i.e., the explosive charge and borehole spacing), and borehole layouts on blasting-induced rock fracturing were examined. The simulation results showed that for a low-density fracture network dominated by short fractures, the pre-existing fractures have little effect on the propagation of blasting-induced cracks. However, as the length or density of fractures increases, pre-existing fractures could restrain the blasting-induced radial crack propagation and enhance the rock fragmentation between the borehole and the pre-existing fracture. This effect gradually disappeared as the in situ stress increased. In addition, the mismatch between the centreline of double boreholes and the direction of high in situ stress could also affect the coalescence of cracks, especially in high-density fracture networks. Finally, the applicability of empty holes to improve the crack coalescence between boreholes in fractured rock was discussed. This study should be beneficial in understanding the blasting behaviour of deep fractured rocks. |
| 资助项目 | National Natural Science Foundation of China[11802058] ; National Natural Science Foundation of China[41831281] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z018010] |
| WOS研究方向 | Energy & Fuels ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000768831100001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34634]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Pan, Cheng |
| 作者单位 | 1.China Railway 16th Bur Grp Co Ltd, Beijing 100018, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Southeast Univ, Sch Civil Engn, Nanjing 211189, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xing,Pan, Cheng,Li, Xiaofeng,et al. Application of a synthetic rock mass approach to the simulation of blasting-induced crack propagation and coalescence in deep fractured rock[J]. GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,2022,8(2):17. |
| APA | Li, Xing,Pan, Cheng,Li, Xiaofeng,Shao, Chengmeng,&Li, Haibo.(2022).Application of a synthetic rock mass approach to the simulation of blasting-induced crack propagation and coalescence in deep fractured rock.GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,8(2),17. |
| MLA | Li, Xing,et al."Application of a synthetic rock mass approach to the simulation of blasting-induced crack propagation and coalescence in deep fractured rock".GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES 8.2(2022):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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